Question

the chemical the chemical formula of sodium sulphate is n a 2 S O
4 and ferric phosphate is FePO4
why is it so explain

Answer 1

Take criss cross method as ionic compounds used

Valencies:-
Na=1
SO4=2
Fe=2
PO4=2

Na            SO4

1                  2

Criss cross- Na2SO4
Similarly try the case with ferrous phosphate.

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